There are many uncertain risk factors in economic evaluation of oil and gas exploration, which are of the utmost importance to the process and decision of oil and gas exploration.

油气勘探经济评价包含着许多不确定性的风险因素，它们对油气勘探过程和决策至关重要。

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But incomplete or sparse information contributes to high levels of risk for oil exploration and development.

而信息的稀少或不完善，又导致了油田勘探和开发过程的高风险。

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The advantages of the slim hole such as reducing cost of drilling, eliminating the risk of the exploration as well as being beneficial to the environment has caught oil field's attention.

小井眼具有可降低钻井成本，减小勘探风险，有利于环保倍受石油界广泛重视。

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The tar sands, with potentially more reserves than Saudi Arabia, have no exploration risk the oil lies just below the surface, in known areas so that eliminates a major cost component for large oil companies.

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Though its financials are good, oil-exploration companies are usually considered higher-risk deals due to the volatility of energy prices and the possibility that they may not be able to take all their wells into viable production.

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Such shareholders may not blink at the prospect of virgin Alaskan wilderness opening up for oil exploration, but they care if this poses a risk to a company's share price.

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